Boiler.



No. 636,633. Paten'fbd Nov'. 7, |899.

T. CHAPMAN.

BILER.

(Application med Aug. 2a, 1893.) (N o M o d a I 7 y 4 "ff ii/iff' UNITED STATES TRUMAN CHAPMAN, OF CONCORD, NORTH CAROLINA.

BolLEVR.

SPECIFICATION forming part of Letters Patent N o. 636,633, dated November 7, 1899. Application filed August 23,'18997. Serial No. 728,212. (No model.)

To all whom t 11i/wy concern:

Be it known that I, TRUMAN CHAPMAN, of Concord, in the countyof Cabarrus and State of North Carolina, have invented a new and Improved Boiler, of which the following is a full, clear, and exact description.

This invention relates to a boiler in which the circulation is enhanced and the heating of the Water rendered more thorough by means of manifolds communicating with the boiler and connecting With each other by pipes passing through the fire-box and combustionchamber of the furnace.

This specification is the disclosure of one form of my invention, While the claim'defines the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a longitudinal section of my invention. Fig. 2 is an irregular section on the line 2 2 of Fig. l, and Fig. 3 is a perspective View of one of the manifolds.

The boiler 4, having the fire-tubes 5, is mounted over the grate 6 of the furnace, all in the usual manner, the products of combustion passing out by a stack 7. Manifolds are arranged at the lower front end of the boiler and at the upper rear end thereof. These manifolds are duplicates in construction and comprise each a main portion or body 8, With an interiorly-threaded flange 9, surrounding an opening in the center of one side thereof, such flange being engaged With a nipple 10, the nipple entering the boiler-shell. Blowout openings are formed in the end of the manifold and provided With closures 11, commanding the same.

The main portion or body 8 of each manifold is formed with a plane side 8a, with which side communicate a number or tubes 12. These tubes pass under the boiler and upward at the rear thereof through the fire-box and combustion-chamber of the furnace, so as to be eectively subjected to the action of the fire Within the same. This arrangement causes a continuous and rapid circulation of the Water and a thorough heating thereof.

It will be observed that by means of the manifolds constructed and arranged as described it is only necessary to pierce the boiler at two points-that is to say, at the points at which the thimbles l0 are inserted in the boiler. The arrangement of the tubes insures effective heating and circulation Without necessitating piercing the boiler-shell at a great number of points.

Having thus described my invention, I claim as new and desire to secure by Letters VPatent- The combination of a boiler proper, a manifold provided With an opening in an intermediate portion thereof, such opening having an internally-threaded iiange, a thimble engaging the flange and communicating with the boiler proper at the upper portion of the rear end thereof, a second manifold located at the lower front portion of the boiler and also having an opening in an intermediate portion thereof, a thimble communicating with the boiler proper and fitted in said opening, the second manifold also having athreaded iiange at the opening to receive the thimble, and Water-tubes passing between the manifolds and extending along the under side of the boiler and up alongside of the rear end thereof.

TRUMAN CHAPMAN.

Witnesses:

L. D. COLTRANE, D. B. COLTRANE. 

